v3.25.2
Note 13 - Segment Information (Details Textual)
gal in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
gal
Jun. 30, 2024
Number of Reportable Segments     3  
California Ethanol [Member]        
GallonPerYear (Gallon)     65  
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales, Wet Distillers Grain and Corn Oil Sales [Member]        
Number of Major Customers 1 1    
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales, Wet Distillers Grain and Corn Oil Sales [Member] | Customer One [Member]        
Concentration Risk, Percentage 99.40% 95.60% 99.40% 92.90%
India Biodiesel [Member]        
GallonPerYear (Gallon)     80  
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member]        
Number of Major Customers 4 3 4 3
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer One [Member]        
Concentration Risk, Percentage 34.00% 44.00% 28.00% 42.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Two [Member]        
Concentration Risk, Percentage 25.00% 34.00% 26.00% 36.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Three [Member]        
Concentration Risk, Percentage 23.00% 17.00% 20.00% 17.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Four [Member]        
Concentration Risk, Percentage 16.00%   19.00%